Those white spots look pretty big to be ich in my opinion....Did he have actual white spots on him or was it bigger than little dots on him? I would def be on the lookout for the next few weeks to see if it affects any other fish.

__________________180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40bREEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.